our next guest uses science to determine who has the more presidential brain, everything from testosterone to estrogen. the author of the "newsweek" article, "who's got a more presidential brain?" i've got to say, dr. fisher, linking hormones and politics sounds suspiciously like a cnn story that we absolutely eviscerated on this show. >> really? >> really? >> really? >> really? >> but i want to give you did benefit of the doubt. tell me about political genetics and what the thrust of your thesis is. >> i'm not familiar with the article -- >> good! good for you. >> it's a good read. it's a good read. >> at all. >> well anyway, you know, i do study the brain and there's a lot of chemicals in the brain and four chemical systems and each one linked with a whole host of personality traits. the dope mean, seretonin and with match.com i created a questionnaire to express the traits in each one of the four systems and taken by over 12 million people on chemistry.com and match went come and i know the chemistry of some personality traits and i wanted to see about obama and romney and i mean they h